1228156747471 has 2 divisors, whose sum is σ = 1228156747472. Its totient is φ = 1228156747470.

The previous prime is 1228156747463. The next prime is 1228156747529. The reversal of 1228156747471 is 1747476518221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228156747471 - 2³ = 1228156747463 is a prime.

It is a super-3 number, since 3×1228156747471³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228157747471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614078373735 + 614078373736.

It is an arithmetic number, because the mean of its divisors is an integer number (614078373736).

Almost surely, 2^{1228156747471} is an apocalyptic number.

1228156747471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228156747471 is an equidigital number, since it uses as much as digits as its factorization.

1228156747471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5268480, while the sum is 55.

The spelling of 1228156747471 in words is "one trillion, two hundred twenty-eight billion, one hundred fifty-six million, seven hundred forty-seven thousand, four hundred seventy-one".